/// <summary>
/// Updates universe to only contain the symbols in the list
/// </summary>
/// <param name="universe">Universe to apply the filter too</param>
/// <param name="filterList">List of Symbols to keep in the Universe</param>
/// <returns>Universe with filter applied</returns>
public static OptionFilterUniverse WhereContains(this OptionFilterUniverse universe, List <Symbol> filterList)
{
universe.AllSymbols = universe.AllSymbols.Where(filterList.Contains).ToList();
universe.IsDynamicInternal = true;
return(universe);
}
/// <summary>
/// Filters universe
/// </summary>
/// <param name="universe">Universe to apply the filter too</param>
/// <param name="predicate">Bool function to determine which Symbol are filtered</param>
/// <returns>Universe with filter applied</returns>
public static OptionFilterUniverse Where(this OptionFilterUniverse universe, Func <Symbol, bool> predicate)
{
universe.AllSymbols = universe.AllSymbols.Where(predicate).ToList();
universe.IsDynamicInternal = true;
return(universe);
}
/// <summary>
/// Binds universe
/// </summary>
/// <param name="universe">Universe to apply the filter too</param>
/// <param name="mapFunc">Symbol function to determine which Symbols are filtered</param>
/// <returns>Universe with filter applied</returns>
public static OptionFilterUniverse SelectMany(this OptionFilterUniverse universe, Func <Symbol, IEnumerable <Symbol> > mapFunc)
{
universe.AllSymbols = universe.AllSymbols.SelectMany(mapFunc).ToList();
universe.IsDynamicInternal = true;
return(universe);
}
/// <summary>
/// Maps universe
/// </summary>
public static OptionFilterUniverse Select(this OptionFilterUniverse universe, Func <Symbol, Symbol> mapFunc)
{
universe._allSymbols = universe._allSymbols.Select(mapFunc).ToList();
universe._isDynamic = true;
return(universe);
}
